2 * linux/arch/arm/plat-omap/common.c
4 * Code common to all OMAP machines.
5 * The file is created by Tony Lindgren <tony@atomide.com>
7 * Copyright (C) 2009 Texas Instruments
8 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/delay.h>
18 #include <linux/console.h>
19 #include <linux/serial.h>
20 #include <linux/tty.h>
21 #include <linux/serial_8250.h>
22 #include <linux/serial_reg.h>
23 #include <linux/clk.h>
26 #include <mach/hardware.h>
27 #include <asm/system.h>
28 #include <asm/pgtable.h>
29 #include <asm/mach/map.h>
30 #include <asm/setup.h>
32 #include <plat/common.h>
33 #include <plat/board.h>
34 #include <plat/control.h>
36 #include <plat/fpga.h>
37 #include <plat/serial.h>
39 #include <plat/clock.h>
41 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
42 # include "../mach-omap2/sdrc.h"
45 #define NO_LENGTH_CHECK 0xffffffff
47 struct omap_board_config_kernel *omap_board_config;
48 int omap_board_config_size;
50 static const void *get_config(u16 tag, size_t len, int skip, size_t *len_out)
52 struct omap_board_config_kernel *kinfo = NULL;
55 /* Try to find the config from the board-specific structures
57 for (i = 0; i < omap_board_config_size; i++) {
58 if (omap_board_config[i].tag == tag) {
60 kinfo = &omap_board_config[i];
72 const void *__omap_get_config(u16 tag, size_t len, int nr)
74 return get_config(tag, len, nr, NULL);
76 EXPORT_SYMBOL(__omap_get_config);
78 const void *omap_get_var_config(u16 tag, size_t *len)
80 return get_config(tag, NO_LENGTH_CHECK, 0, len);
82 EXPORT_SYMBOL(omap_get_var_config);
85 * 32KHz clocksource ... always available, on pretty most chips except
86 * OMAP 730 and 1510. Other timers could be used as clocksources, with
87 * higher resolution in free-running counter modes (e.g. 12 MHz xtal),
88 * but systems won't necessarily want to spend resources that way.
91 #define OMAP16XX_TIMER_32K_SYNCHRONIZED 0xfffbc410
93 #if !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX))
95 #include <linux/clocksource.h>
98 * offset_32k holds the init time counter value. It is then subtracted
99 * from every counter read to achieve a counter that counts time from the
100 * kernel boot (needed for sched_clock()).
102 static u32 offset_32k __read_mostly;
104 #ifdef CONFIG_ARCH_OMAP16XX
105 static cycle_t omap16xx_32k_read(struct clocksource *cs)
107 return omap_readl(OMAP16XX_TIMER_32K_SYNCHRONIZED) - offset_32k;
110 #define omap16xx_32k_read NULL
113 #ifdef CONFIG_ARCH_OMAP2420
114 static cycle_t omap2420_32k_read(struct clocksource *cs)
116 return omap_readl(OMAP2420_32KSYNCT_BASE + 0x10) - offset_32k;
119 #define omap2420_32k_read NULL
122 #ifdef CONFIG_ARCH_OMAP2430
123 static cycle_t omap2430_32k_read(struct clocksource *cs)
125 return omap_readl(OMAP2430_32KSYNCT_BASE + 0x10) - offset_32k;
128 #define omap2430_32k_read NULL
131 #ifdef CONFIG_ARCH_OMAP3
132 static cycle_t omap34xx_32k_read(struct clocksource *cs)
134 return omap_readl(OMAP3430_32KSYNCT_BASE + 0x10) - offset_32k;
137 #define omap34xx_32k_read NULL
140 #ifdef CONFIG_ARCH_OMAP4
141 static cycle_t omap44xx_32k_read(struct clocksource *cs)
143 return omap_readl(OMAP4430_32KSYNCT_BASE + 0x10) - offset_32k;
146 #define omap44xx_32k_read NULL
150 * Kernel assumes that sched_clock can be called early but may not have
153 static cycle_t omap_32k_read_dummy(struct clocksource *cs)
158 static struct clocksource clocksource_32k = {
159 .name = "32k_counter",
161 .read = omap_32k_read_dummy,
162 .mask = CLOCKSOURCE_MASK(32),
164 .flags = CLOCK_SOURCE_IS_CONTINUOUS,
168 * Returns current time from boot in nsecs. It's OK for this to wrap
169 * around for now, as it's just a relative time stamp.
171 unsigned long long sched_clock(void)
173 return clocksource_cyc2ns(clocksource_32k.read(&clocksource_32k),
174 clocksource_32k.mult, clocksource_32k.shift);
178 * read_persistent_clock - Return time from a persistent clock.
180 * Reads the time from a source which isn't disabled during PM, the
181 * 32k sync timer. Convert the cycles elapsed since last read into
182 * nsecs and adds to a monotonically increasing timespec.
184 static struct timespec persistent_ts;
185 static cycles_t cycles, last_cycles;
186 void read_persistent_clock(struct timespec *ts)
188 unsigned long long nsecs;
190 struct timespec *tsp = &persistent_ts;
192 last_cycles = cycles;
193 cycles = clocksource_32k.read(&clocksource_32k);
194 delta = cycles - last_cycles;
196 nsecs = clocksource_cyc2ns(delta,
197 clocksource_32k.mult, clocksource_32k.shift);
199 timespec_add_ns(tsp, nsecs);
203 static int __init omap_init_clocksource_32k(void)
205 static char err[] __initdata = KERN_ERR
206 "%s: can't register clocksource!\n";
208 if (cpu_is_omap16xx() || cpu_class_is_omap2()) {
209 struct clk *sync_32k_ick;
211 if (cpu_is_omap16xx())
212 clocksource_32k.read = omap16xx_32k_read;
213 else if (cpu_is_omap2420())
214 clocksource_32k.read = omap2420_32k_read;
215 else if (cpu_is_omap2430())
216 clocksource_32k.read = omap2430_32k_read;
217 else if (cpu_is_omap34xx())
218 clocksource_32k.read = omap34xx_32k_read;
219 else if (cpu_is_omap44xx())
220 clocksource_32k.read = omap44xx_32k_read;
224 sync_32k_ick = clk_get(NULL, "omap_32ksync_ick");
226 clk_enable(sync_32k_ick);
228 clocksource_32k.mult = clocksource_hz2mult(32768,
229 clocksource_32k.shift);
231 offset_32k = clocksource_32k.read(&clocksource_32k);
233 if (clocksource_register(&clocksource_32k))
234 printk(err, clocksource_32k.name);
238 arch_initcall(omap_init_clocksource_32k);
240 #endif /* !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX)) */
242 /* Global address base setup code */
244 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
246 static void __init __omap2_set_globals(struct omap_globals *omap2_globals)
248 omap2_set_globals_tap(omap2_globals);
249 omap2_set_globals_sdrc(omap2_globals);
250 omap2_set_globals_control(omap2_globals);
251 omap2_set_globals_prcm(omap2_globals);
252 omap2_set_globals_uart(omap2_globals);
257 #if defined(CONFIG_ARCH_OMAP2420)
259 static struct omap_globals omap242x_globals = {
260 .class = OMAP242X_CLASS,
261 .tap = OMAP2_L4_IO_ADDRESS(0x48014000),
262 .sdrc = OMAP2420_SDRC_BASE,
263 .sms = OMAP2420_SMS_BASE,
264 .ctrl = OMAP2420_CTRL_BASE,
265 .prm = OMAP2420_PRM_BASE,
266 .cm = OMAP2420_CM_BASE,
267 .uart1_phys = OMAP2_UART1_BASE,
268 .uart2_phys = OMAP2_UART2_BASE,
269 .uart3_phys = OMAP2_UART3_BASE,
272 void __init omap2_set_globals_242x(void)
274 __omap2_set_globals(&omap242x_globals);
278 #if defined(CONFIG_ARCH_OMAP2430)
280 static struct omap_globals omap243x_globals = {
281 .class = OMAP243X_CLASS,
282 .tap = OMAP2_L4_IO_ADDRESS(0x4900a000),
283 .sdrc = OMAP243X_SDRC_BASE,
284 .sms = OMAP243X_SMS_BASE,
285 .ctrl = OMAP243X_CTRL_BASE,
286 .prm = OMAP2430_PRM_BASE,
287 .cm = OMAP2430_CM_BASE,
288 .uart1_phys = OMAP2_UART1_BASE,
289 .uart2_phys = OMAP2_UART2_BASE,
290 .uart3_phys = OMAP2_UART3_BASE,
293 void __init omap2_set_globals_243x(void)
295 __omap2_set_globals(&omap243x_globals);
299 #if defined(CONFIG_ARCH_OMAP3)
301 static struct omap_globals omap3_globals = {
302 .class = OMAP343X_CLASS,
303 .tap = OMAP2_L4_IO_ADDRESS(0x4830A000),
304 .sdrc = OMAP343X_SDRC_BASE,
305 .sms = OMAP343X_SMS_BASE,
306 .ctrl = OMAP343X_CTRL_BASE,
307 .prm = OMAP3430_PRM_BASE,
308 .cm = OMAP3430_CM_BASE,
309 .uart1_phys = OMAP3_UART1_BASE,
310 .uart2_phys = OMAP3_UART2_BASE,
311 .uart3_phys = OMAP3_UART3_BASE,
314 void __init omap2_set_globals_343x(void)
316 __omap2_set_globals(&omap3_globals);
319 void __init omap2_set_globals_36xx(void)
321 omap3_globals.uart4_phys = OMAP3_UART4_BASE;
323 __omap2_set_globals(&omap3_globals);
327 #if defined(CONFIG_ARCH_OMAP4)
328 static struct omap_globals omap4_globals = {
329 .class = OMAP443X_CLASS,
330 .tap = OMAP2_L4_IO_ADDRESS(OMAP443X_SCM_BASE),
331 .ctrl = OMAP443X_CTRL_BASE,
332 .prm = OMAP4430_PRM_BASE,
333 .cm = OMAP4430_CM_BASE,
334 .cm2 = OMAP4430_CM2_BASE,
335 .uart1_phys = OMAP4_UART1_BASE,
336 .uart2_phys = OMAP4_UART2_BASE,
337 .uart3_phys = OMAP4_UART3_BASE,
338 .uart4_phys = OMAP4_UART4_BASE,
341 void __init omap2_set_globals_443x(void)
343 omap2_set_globals_tap(&omap4_globals);
344 omap2_set_globals_control(&omap4_globals);
345 omap2_set_globals_prcm(&omap4_globals);
346 omap2_set_globals_uart(&omap4_globals);